package itheima.reggie.service.impl;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import itheima.reggie.common.CustomException;
import itheima.reggie.entity.*;
import itheima.reggie.mapper.OrdersMapper;
import itheima.reggie.service.*;
import itheima.reggie.utils.BaseContext;
import itheima.reggie.utils.DateUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.transaction.support.TransactionTemplate;

import java.math.BigDecimal;
import java.util.Date;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service("ordersService")
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService orderDetailService;
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private  TransactionTemplate transactionTemplate;
    @Override
    @Transactional(rollbackFor = Exception.class)
    public void submit(Orders orders) {
        //获取当前用户id
        Long userId = BaseContext.getCurrentId();
        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> carts = shoppingCartService.list(queryWrapper);
        if (carts==null||carts.size()==0){
            throw new CustomException("购物车为空，不能下单");
        }
        //查询用户数据
        User user=userService.getById(userId);
        //查询当前地址数据
        AddressBook addressBook=addressBookService.getById(orders.getAddressBookId());
        if (addressBook==null){
            throw new CustomException("用户地址错误，无法下单");
        }
        long orderId = IdWorker.getId();
        AtomicInteger amount=new AtomicInteger(0);
        //遍历订单计算金额
        List<OrderDetail> orderDetails=carts.stream().map((item)->{
            OrderDetail orderDetail=new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        //向订单表插入数据，一条数据
        orders.setNumber(String.valueOf(orderId));
        orders.setId(orderId);
        orders.setOrderTime(DateUtils.DateFormat(new Date()));
        orders.setCheckoutTime(DateUtils.DateFormat(new Date()));
        orders.setUserId(userId);
        orders.setStatus(2);
        orders.setAddress(addressBook.getDetail());
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setAmount(new BigDecimal(amount.get()));//计算总金额
        orders.setUserName(user.getName());
        this.save(orders);
        //向订单明细插入数据，多条数据
        transactionTemplate.execute((status)->{
        orderDetailService.saveBatch(orderDetails);
        //清空购物车数据
        shoppingCartService.remove(queryWrapper);
            return null;
        });
    }

}
